Valve apparatus



11g- 17, 1954 G. E. CARLSON ETAL 2,586,652

VALVE APPARATUS Y Filed Jan. 29, 1951 3 sheets-sheet 1 /QTTRNE Y.

Aug. 17, 1954 Filed Jan. 29, 1951 G. E. CARLSON ET AL VALVE APPARATUS I5 Shee'ts-Sheet 2 IN V EN TORS.

Aug. 17, 1954 G. E. CARLSON ETA'L 2,686,652

VALVE APPARATUS Filed Jan. 29, 1951 3 Sheets-Sheet 3 Fife I Fz'yr INVENToRs.' GEO/GE E. cA/as'a/v u. PARKER @A0E/e BY NAf/MN E: owE/v H- www hollow Patented Aug. 17, 1954 `UNITED STATES PATENT OFFICE Bader and Nathan B. Owen, Minn., assignorsV to` Viking Valve Louis Park, Minn., a corporation Minneapolis, Company, St. of Minnesota Application January 29, 1951, Serial No. 208,352

6 Claims. 1

The invention herein has relation to a valve apparatus useful for many purposes but devised to be especially useful for controlling flow of uids under pressure from cans orother containers.

The object of the invention is to provide a so called aerosol valve which will be of new, simple, inexpensive, eii'icient and improved construction.

In the accompanying drawings forming a part of this specification,

Fig. 1 isa vertical central sectional View, partially in elevation and partially broken away, of a valve apparatus incorporating features and characteristics of the invention;

Fig. 2` is a fragmentary ViewV corresponding with the disclosure of Fig. 1 but showing parts in different positions;

Fig. 3 is a `fragmentary top` plan view of the Valve apparatus of Figs. 1 and` 2` disclosing a locking element of said apparatus as `when situated to retain a valve of the apparatus in closed condition;

Fig. 4 is a view corresponding generally with the disclosure of Fig. 3 but showing the locking element as when situated to permit operation of said Valve to open position;

Fig. 5 is a vertical central sectional view, partially in elevation and partially broken away, oi a valve apparatus of modied construction made according to the invention, showing a valve of the apparatus as when closed;

Fig. 6 is a fragmentary View corresponding generally with the disclosure. of ing the valve of said apparatus Fig. 7 is a fragmentary top apparatus of Figs. 5 and 6;

Eg. 8 is a vertical central sectional view, partially in elevation and partially broken away, or" a valve apparatus of further modied construction incorporating features and characteristics of the invention, showing the valve closed;

1Fig. 9 is a fragmentary view corresponding generally with the disclosure of Fig. 8 but showing the valve open; and

Fig. 1G is a fragmentarytop plan view of the Valve apparatus of Figs. 8 and 9.

With respect to Figs. 1 to 4 of the drawings and the numerals of reference thereon, a can l '.3 there shown may be of ordinary or preferred construction. As disclosed, said can is constituted as a member bounded at its sides by a cylindrical wall i6 which merges at its upper end in an annular wall l 'i extending upwardly and inwardly. The upper end of the annular wall i7 is integral with a cap member l 8 which, together with Fig. 5 but shown as when open; plan View of the said annular wall, bounds the upper end of said hollow member or can, and the lower end of the hollow member or can is covered by an upwardly bowed closure wall i9 of circular outline fitted `upon and attached to the lower end of the cylindrical wall I6.

An outer, lower shell 2Q of the Valve apparatus is constituted as a cup shape member having an upper end flared portion 2| thereof extending downwardly and inwardly and retained within the cap member 8, against the possibility of movement of said portion 2l toward the bottom closure wall i9 oi the can, by an annular flange 22 of said can extending downwardly and inwardly from said cap member and integrally `joined with the upper circular end of said annu-` lar wall Il. A cylindrical intermediate portion 23 of the cup shape member or outer, lower shell 29, immediately below the upper end iiared portion 2|, merges integrally at its lower end an interiorly extending annular shoulder 2d in perpendicular relation to said intermediate portion 23, and the interior marginal circular portion of said annular shoulder 2t integrally supports a cylindrical lower portion 25 of said cup shape member or outer, lower shell which is below and concentric with the cylindrical intermediate portion 23. In turn, the lower end of the cylindrical lower portion 25 is integral with a base 2b of the cup shape member or outer, lower shell 2t, and a tube El, for delivering iluid under pressure to a lower portion of the interior of said cup shape member or outer, lower shell, communicates with a lower portion of the interior of the cup shape member or outer, lower shell by way of an opening 28 through the base 2S. More explicitly stated, a pipe ange 2S integral with the base 26 is fitted into the upper end of the tube 2l. Desirably, the lower end o1" said tube 2l will terminate in adjacent relation to the bottom wall of the can. i

An annular gasket Se is retained up against the internal surface of the base oi the cap member I3 by an inner, upper shell Si, and said inner, upper shell is rigidly retained within said cap member by said annular gasket tu and the cup shape member or outer, lower shell 2G and in turn rigidly retains the ared portion 2l of said cup shape member or cuter, lower shell down against the interior surface of the annular i'iange 22. A cylindrical intermediate portion 32 of the inner, upper shell 3l is snugly fitted in the cylindrical intermediate 'portion 23 of the cup shape member or outer, lower shell 2d and merges integrally at its upper end in an outwardly extending anupper edge of the flared portion 2i of said outer,

lower shell 20. Said cylindrical intermediate portion 32 merges integrally at its lower end in an inwardly extending annular shoulder 36 in perpendicular relation to said intermediate portion and in spaced, parallel relation to the annular shoulder 2B. The annular shoulders 55 and 2li are in alined relation longitudinally ofthe can 15.

A Valve member of the apparatus is constituted as a conical valve 3l integrally supported by an elongated cylindrical stem 38 snugly supported for slidable movement longitudinally of the can in the base of the cap member I8 and the annular gasket 3Q in spaced, concentric relation to the flange `of said cap member.

A valve-seat-providing and sealing-oil member of said apparatus is constituted as a hollow body 39 in spaced, surrounding relation to the Valve stem 38 and an annular diaphragm lli] integral with said hollow body and in Vsurrounding relation to said valve stem.

The hollow body 39 is xedly seated in the cylindrical intermediate portion 23 of the cup shape member or outer, lower shell 2o between the annular shoulders 24 and 35, and an annular passageway Il! within said hollow body is contiguous with the stem 38 and the conical valve 3l and the end of the hollow body adjacent said conical valve, but sealed closed adjacent the end ofV said hollow body opposite the conical valve by said stem 38 and the annular diaphragm d. Said annular'passageway di is bounded at its lower end, or end opposite said annular diaphragm 4B, by a downwardly and outwardly eX- tending, inwardly facing annular valve seat 42 disposed at the interior side of the conical valve 3l, and said conical valve is in spaced relation to the base 26 of the outer, lower shell 2d. A rst lateral port 43 in the Valve stem 3B, at the side of the annular valve seat #i2 opposite the conical Valve 3l, is contiguous at its exterior end with the annular passageway di and at its interior end with a longitudinal port :ld in said valve stem, and said longitudinal port is contiguous, at an upper portion thereof spaced from the conical valve 3l and disposed exteriorly of the can i5, with the interior end of a second lateral port 45 the exterior end of which opens to an outlet nozzle 46 from said Valve stem. A sealing plug for the upper end of the valve stem 38 is denoted 55.

As disclosed, a compression coil spring constitutes a device both for sealing an upper portion of the annular diaphragm 46 about and against an intermediate portion of the Valve stem 38 and for resiliently retaining the conical valve 3l in engaged relation with the annular valve'seat 42. An upper portion of said annular diaphragm is pressingly surrounded by an upper portion il of the compression coil spring thus to be sealed about and against said valve stem directly beneath an annular shoulder d8 thereof, and a lower portion 49 of said-compression coil spring is in spaced, surrounding relation to the annular diaphragm and has its lower end seated against an upper surface of the annular shoulder 36 thus to resiliently urge the valve stem 38 to move upwardly and the conical Valve 3l to be engaged against the annular valve seat 112. It is to be understood that the compression coil spring can be omitted in an instance when an upper portion of the annular diaphragm dii is seated against the valve stem in a manner diierent from that shown and a lower portion of said annular diaphragm itself possesses-sufficient resilient power normally to retain the conical valve 3l' engaged up against the annular valve seat 42.

AV locking element for retaining the conical valve 3l and the annular Valve seat 42 in engaged relation against the possibility of accidental removal of said conical valve from said annular valve seat, as when a can having the Valve apparatus is being shipped or otherwise handled, is constituted as a resilient clip 59 open at a smaller and closed at a larger side thereof. Oppositely disposed, part-circular elements 5i, 5! of the resilient clip 5@ are spaced apart a distance slightly less than the diameter of the Valve stem 3S, and said valve stem has a circular groove 52 in its periphery perpendicular to its axis. The construction and arrangement will be such that the part-circular elements 5|, 5i can be situated in the circular groove 52 and engaged against the external surface of the base of the cap member I8 of the can, as in Figs. 1 and 3, to lock the valve stem 38 against longitudinal movement with the conical valve 3l and the annular valve seatV 42 in engagement. When it is desired that the Valve stem 38 be released so that it may be longitudinally slid inwardly, the resilient clip 50 can either be removed from the valve stem, or slid to position, as in Figs. 2 and 4, where the part-circular elements 53, 53, spaced at farther distance apart, will be disposed clear of the circular groove 52 exteriorly thereof.

When it is desired to dispense fluid under pressure from the can i5, the valve stem 3B will be manually depressed against resilient action of the compression coil spring thus to remove the conical valve 3l from the annular valve seat 42. Upon release of said valve stem, said compression coil spring immediately will react to return said conical valve into engaged relation with said annular valve seat. When the valve is in open condition, ow from the can l5 will be by way of the tube 2l, the outer, lower shell 20, the annular passageway l i the nrst lateral port 43, the longitudinal port lili and the second lateral port 45 to the outlet nozzle fit.

The only parts or the valve apparatus with which fluid under pressure being dispensed can come in contact are the tube 2l, the outer, lower shell 2E, the hollow body 39 and the annular diaphragm. lo or" the Valve-seat-providing'and sealing-off member, and the valve member constituted as the conical valve 3l and the elongated valve stem 38. Desirably, all of the parts of the apparatus to be contacted by fluid under pressure will be of non-metallic material, thus to insure that there will be no occurrence of electrolytic action. As shown, the member comprising the hollow body 3d and the annular diaphragm d is of molded rubber, and the tube 2l', the outer, lower shell and the member comprising the conical valve 3l' and the stem 38 are of plastic material.

Referring to Figs. 5 to '7 of the drawings, 55 denotes a can of construction similar to that of the can i5. A cylindrical wall 56 of the can 55 merges at its upper end in an annular wall 5l' which extends upwardly and inwardly. The

assente upper end of the annular` wall 51 is connected;-

through the medium of a downwardly and inwardly extending annular flange 62, with a cap member 58. The lower end of the can 55 is covered-by a closure wall 59.

An outer, lower shell SG, equivalent to the outer, lower shell 2li, is a cup shape member having an upper end ared portion 6l thereof extending downwardly and inwardly and retained within the cap member it by the annual nange 62 of the can. A cylindrical intermediate portionl 63 of theV outer, lower shell Sil, below the ared` portion iii, merges at its lower end in an interiorly extending annular shoulder Bil in pern pendicular` relation to said intermediate portion E3; Theinterior marginal portion of said annular shoulder 64 supports a cylindrical lower porn tion 65 of said outer, lower shell 6d below and concentric with the intermediate portion 63, A base 56 of the outer, lower shell te is integral with the lower end of the cylindrical lower portion oi said outer, lower shell, and a tube 'i communicates with a lower portion of the interior of the outer, lower shell Sli by way oi an opening 68 through the' base Se and a pipe flange t9 upon said base and in the adjacent end portion of said tube.

An annular gasket 'Hl is retained up against the internal surface of the base of the cap member 58 by an inner, upper shell 'li itself' rigidly retained within said cap member by the annular gasket h3 and the outer, lower shell 6Fl and rigidly retaining the nange portion Si of said outer, lower shell Bil down against the interior surfacev of the annular flange 52. A cylindrical intermediate portion 'l2 of the inner, upper shell l! is nti-ed in the cylindrical intermediate portion 53 of the outer, lower shell Ell and merges at its upper end in an outwardly extending annular flange '53 seated aga-inst the interior surface of theannular gasket lll. The outer marginal portion oi the annular ilange i3 merges in a downwardly extending ring i4 conoentrically surrounding the cylindrical intermediate portion 'I2 and having its external surface engaged against the internal surface of the ange of the cap member 58 and its lower edge l5 seated against the upper edge of the flared portion 6i of the outer, lower shell The cylindrical intermediate portion i2 merges at its lower end in an inwardly extending annular shoulder le in perpendicular relation to said intermediate portion and in spaced, parallel relation to the ann nular shoulder lill. annular shoulders l and Ell are alined longitudinally of the can 55.

A Valve member is constituted as an element with annular groove supporting an O-ring valve lll and including an elongated cylindrical stern l integral with said element snugly supported for slidable movement longitudinally of the can in the base or the cap member 53 and the annular gasket 'Ill in spaced, concentric relation to flange of the cap member.

A valve-seat-providing member is constituted as a hollow body l5 in spaced, surrounding relan tion to the valve stem "ill, and a sealing-oil niember is constituted as an annular diaphragm. 3i? in surrounding relation to said valve stem.

The hollow body 'i9 is xedly seated in the cylindrical intermediate portion l'|53 of the outer, lower shell @E between the annular shoulder it and an annular lower edge portion of' the annular diaphragm il@ engaged against the lower surface of the annular shoulder lt. An annular passageway 8L within the hollow body i9.- iscontiguous with the stem 'Hl andztheoeringvalve 'Vl andthe endof` said hollow body adjacent said L3-ringvallve, but,V sealed closed adjacentthe end of the hollow body opposite said O-ring valve by said stein 'i3 andthe annulardiaphragm 80. Said annular passageway Si is bounded at its lower end, or end opposite said annular diaphragm Sil, by a downwardly and outwardly extending, inwardly facing annular Valve seat 82 disposed at` the interior side of the O-ring valve l1. The element with annular groove supporting said Geringvalve is'in. spaced relation tothe base S6 of the outer, lower shell $0. A lateral port in the valve stern lt, at the side of the annular` valvelseat e?, opposite the O-ring valve lll, is con-` tiguous at its exterior end with the passageway 8i and at its interior end with a longitudinal port' 8d in said valve stem, and said longitudinal port is contiguous, at a location exterior oi the can above its cap member, with the interior end of an outlet nozzle B5 from said valve stern. The upper end portion oi the valve stem 'lll is. enlarged' in the disclosure as made.

A compression coil spring St constitutes a device both for sealing an upper portion of the annular diaphragm @t about and against an inten mediate portion oi the valve stern 'lil and for resiliently retaining the O-ring valve ll in engaged relation with the annular valve seat 82.4 An upper portion of said annular diaphragm isclosely surrounded oy an upper portion of the compresn sion coil spring B and` thus sealed about and againstfthe valve stern lil. and a lower portion of said compression coil spring is in spaced, surrounding relation to the annular diaphragm 8d and` has its lower end seated against. the annular shoulder le thus to resiliently urge the valve stein 'E3 to move the Owing valve il into engaged relationwith the annular valve seat 322.

A locking element for retaining the Oring valve 'il and the annular Valve seat 82 in engaged relation is constituted as a flexible split nut 8l having an internal thread 88 engaged with an external thread upon an upper portion of the valve stern 'it above the cap member 58 of the canta. Thenexible split nut il? will he of construction to be capable of being spread-to be ntted uponthe valve stem. rEhe 0-ring valve can be retained against the annular valve seat merely by turning the flexible split nut lll down againstV the external surface or the base of the cap member 5E or the can asin Fig. 5 of the drawings. When it is desired that the Valve stem 'it be released inorder that it can he manually actuated, thus to remove the O-ring valve from the annular valve seat, the flexible split nut el will be turned to position, as in Fig. 5, where in spaced relation. to the base of the cap member of the The valve apparatus of Figs. 5 to l is operative substantially in the manner as set forth in connection with the disclosure of lligs. 1 and 2. When the @Jing valve il isinV spaced relation to the annular valve seat 32, as in Fig. '6, flow from the can 55 will be by way of the tube di, the outer, lower shell dit, the annular passageway .f'l'i and the ports and S4 to the outlet nozzle The parts of the valve apparatus of Figs. 5 to 'l with which iluid under pressure can come in Contact are the tube 6l, the outer, lower shell the hollow body lil, the annular diaphragm di?, and the Valve member including the C-ring valve llV and the elongated valve stem 18. As disclosed', the O-ring valve l1 and the annular dia- 7 phragm 8|] are of molded rubber, and the tube S'I, the outer, lower shell E@ and the member providing the stem 'la and the support for the O-ring valve 'Il are of plastic material.

Referring to Figs. 8 to 10, a can 9e there shown is constituted as a hollow member bounded at its sides by a cylindrical wall Qi which merges at its upper end in an annular wall 92 extending upwardly and inwardly. The upper end of the annular wall 92 is integral with a cap member constituted as a vertical circular wall 93, extending upwardly from said annular wall 92, and a hollow conical wall Sli integral with the upper edge of the circular wall dit and extending downwardly and inwardly therefrom. An inwardly extending annular flange 9d upon the lower inner edge of the hollow conical wall 94 is substantially perpendicular to the longitudinal axis of the can ed. The lower end of said can is covered by a closure wall 95.

An outer, upper shell of the valve apparatus of Figs. 8 to l0 is constituted as an annular element including a cylindrical intermediate portion 91, concentric with the cylindrical wall SI, having spaced, interiorly extending upper and lower annular shoulders @ai and 99 thereon in substantially perpendicular relation to said intermediate portion si'. The interior marginal edge of the upper annular shoulder ed is integral with an exteriorly extending annular flange Idil above and in spaced relation to said upper annular shoulder 98. As will be clear from Figs. 8 and 9, the annular shoulder 8B and the annular flange 00 are secured against the lower and upper surfaces, respectively, of annular flange 95 to cause the outer, upper shell to be nxedly supported within the can.

An inner, lower shell includes a cylindrical upper portion iii! having its external surface engaged against the internal surface of the cylindrical'portion el of the outer, upper shell and its upper edge contiguous with the lower, inner surface or the upper annular shoulder 9-8. The cylindrical upper portion ll merges at its lower end in an interiorly extending annular shoulder EQ2 in perpendicular relation to said upper portion i@ l, and the interior marginal portion of said annular shoulder itil. supports a cylindrical lower portion HB3 of said inner, lower shell below and concentric with said cylindrical upper portion i534. The lower end of the cylindrical lower portion Iil is Vintegral with a base llid of the inner, lower shell, and a tube ico communicates with a lower portion of said inner, lower shell by way of an opening i through the base IIJll and a pipe ila-nge lill upon said base and in the adjacent end portion of the tube I d5.

A valve member is constituted as a conical valve HB8 integral with an elongated cylindrical stern Ide disposed in spaced, concentric relation to the cylindrical intermediate portion 91 of the outer, upper shell and the cylindrical upper portion l di of the inner, lower shell.

A valve-seat-providing and sealing-off member is constituted as a hollow body I I il in spaced, surrounding relation to the valve stem IBS and an annular diaphragm HI integral with said hollow body I It and in surrounding relation to said valve stem.

The hollow body Htl is xedly seated in the annular element of the outer, upper shell between the annular shoulders d8 and H32 and against the internal surface of the cylindrical upper portion lol of the inner, lower shell. An annular passageway II2 within the hollow body IIil is contiguous with the stem m9 and the conical valve Iot and the end of said hollow body adjacent said conical valve. Said stem and the annular diaphragm i I i seal the annular passageway H2 closed adjacent the end of the hollow body il@ opposite said conical valve I 08. Said annular passageway H2 is bounded at its lower end, or end opposite said annular diaphragm I I I, by a downwardly and outwardly extending, inwardly facing annular valve seat i i3 disposed at the interior side of the coni-cal valve HI8. Said conical valve normally is in spaced relation to the base Idil of the inner, lower shell, and spacing elements lid on the lower end of the valve member are for precluding the possibilityof actuation of the conical valve toward said base IM to the closed condition of the opening Ido. A lateral port M5 in the valve stem Ide above the conical valve ISEE is contiguous at its exterior end with the annular passageway H2 and at its interior end with a longitudinal port H5 in said valve stem, and said longitudinal port is contiguous, at a location above the can, with the interior end of an outlet nozzle i il from said valve stem. As shown, the annular diaphragm l l! includes an upper portion H8 snugly seated in a downwardly facing annular groove iid in the valve stein iii@ thus to cause the annular passageway H2 to be closed at its upper end. Said annular diaphragm Iii will be constituted as a resilient member possessing suiicient power normally to retain the conical valve idd engaged against the annular valve seat H3.

A locking element for retaining the conical valve HDB and the annular valve seat H3 in engaged relation is constituted as a exible split nut 26 having an internal thread i2!! engaged with an external thread E22 upon an upper portion of the valve stern Eile above the annular diaphragm lil. The iiexible splitnut ld will be spread thus to be fitted upon the valve stem its. The conical valve ith and the annular valve seat H3 can be retained in engagement by turning the iiexible split nut il down against the cap member or" the can, as it is shown in Fig. 8, and the valve stern lil@ can be released to be movable vertically relative to the can by turning said flexn ible split nut to position, as in Fig. 9, where in spaced relation to the cap member of said can.

The conical valve idd can be unseated merely by depressing the valve stein ide against resilient action of the annular diaphragm iii, and upon release or" said valve stem, said annular diaphragm iii will immediately react to cause said conical valve to be seated against the annular valve seat. When the conical valve M118 and the annular valve seat lit are in separated relation, flow from the can @d will be by way of the tube EEES, the inner, lower shell, the annular passageway H2 and the ports M5 and ile to the outlet nozzle il?.

Fluid under pressure in and dispensed from the can Sli will come in contact with the tube |05, the outer, upper and inner, lower shells of the valve apparatus, the hollow body i if), the annular diaphragm iii and the valve member including the conical valve l, the stern Idd and the spacing elements lili. As shown, the hollow body lie and the annular diaphragm lli are of molded rubber, and the tube l @5, the outer, upper and inner, lower shells and the valve member are of non-metallic material.

What is claimed is:

1. A valve apparatus for a container havinga constricted neck, said apparatus comprising an open bottomed cup-shaped member having an upper portion adapted to be secured in the container neck and having in its lower portion a pair of axially spaced inwardly directed flanges, hollow resilient means clamped between said nanges comprising a radially inwardly thickened lower portion having an axial opening in its bottom end forming a valve seat communicating with the opening in the bottom of the cupshaped member and having a relatively thin diaphragm portion projecting radially inwardly and upwardly from its upper portion and extending above the upper edge of said cup-shaped member, and a valve stem mounted within the hollow of said resilient means having the diaphragm portion thereof embracing its intermediate portion in sealed relation and terminating at its bottom in a radial enlargement constituting a valve cooperating with said seat, said stem having a bore communicating with the hollow of said resilient means above said enlargement and said enlargement being normally held engaged with said seat by the resilience of the diaphragm portion of the resilient means and being depressible with flexing of the diaphragm portion to unseat the valve.

2. The combination claimed in claim l, including a downwardly facing shoulder formed on the valve stem above its intermediate portion and a coil spring compressed between said shoulder and the upper of the axially spaced flanges of the cup-shaped member for assisting by its tension in urging the valve against the seat.

3. The combination claimed in claim 1, in which the hollow resilient means is a one-piece integral body.

4. The combination claimed in claim 1, in which the inwardly thickened lower portion and the diaphragm portion of the resilient means are separate elements clamped together in sealed relation between the axially spaced ilanges of the cup-shaped member.

5. The combination claimed in claim l, in which the opening in the bottom of the cupshaped member is defined by a third radially inwardly directed flange axially spaced below said pair of axially spaced ilanges, said third flange 10 servingy as a stop for limiting inward movement of the valve.

6. A valve apparatus for a container having a constricted neck providing an inwardly directed shoulder, said apparatus comprising an open bot tomed cup-shaped member having at its upper edge an outwardly turned Iiange adapted to be seated on said inwardly directed shoulder of the container neck and having below said upper edge a pair of axially spaced inwardly directed ilanges, hollow resilient means clamped between said ilanges comprising a radially inwardly thickened lower portion having an axial opening in its bottom end forming a valve seat communicating with the opening in the bottom of the cup-shaped member and having a relatively thin diaphragm portion projecting radially inwardly and upwardly from its upper portion and extending above the upper edge of said cup-shaped member, and a valve stem mounted within the hollow of said resilient means having the diaphragm portion thereof embracing its intermediate portion in sealed relation and terminating at its bottom in a radial enlargement constituting a valve cooperating with said seat, said stem having a bore communicating with the hollow of said resilient means above said enlargement and said enlargement being normally held engaged with said seat by the resilience of the diaphragm portion of the resilient means and being depressible with iiexing of the diaphragm portion to unseat the valve.

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